<template>
  <div>
    <div style="margin: 10px 0">
      <el-input style="width: 200px" placeholder="请输入名称" suffix-icon="el-icon-search" v-model="name"></el-input>
      <el-button style="margin-left: 8px" type="primary" @click="load">搜索</el-button>
      <el-button type="warning" @click="reset">重置</el-button>
    </div>
    <div style="margin: 10px 0">
      <el-upload action="http://localhost:8081/file/upload" :show-file-list="false" :on-success="handleFileUploadSuccess" style="display: inline-block">
        <el-button type="primary">上传文件 <i class="el-icon-upload el-icon--right"></i></el-button>
      </el-upload>
        <el-button @click="delBatch" type="danger" style="margin-left: 5px" slot="reference">
          批量删除<i class="el-icon-remove-outline"></i>
        </el-button>
    </div>
    <el-table :data="tableData" border stripe :header-cell-class-name="'headerBg'" v-loading="loading" @selection-change="handleSelectionChange">
      <el-table-column type="selection" width="55"></el-table-column>
      <el-table-column prop="id" label="ID" width="80"></el-table-column>
      <el-table-column prop="name" label="文件名称"></el-table-column>
      <el-table-column prop="type" label="文件类型"></el-table-column>
      <el-table-column prop="size" label="文件大小(kb)"></el-table-column>
      <el-table-column label="下载">
        <template v-slot="scope">
          <el-button type="primary" @click="download(scope.row.url)" class="el-icon-download">下载</el-button>
        </template>
      </el-table-column>
      <el-table-column label="操作" >
        <template v-slot="scope">
          <el-button type="danger" icon="el-icon-delete" @click="del(scope.row)">删除</el-button>
        </template>
      </el-table-column>
    </el-table>

    <div style="padding: 10px 0">
      <el-pagination
          @size-change="handleSizeChange"
          @current-change="handleCurrentChange"
          :current-page="pageNum"
          :page-sizes="[2, 5, 10, 20]"
          :page-size="pageSize"
          layout="total, sizes, prev, pager, next, jumper"
          :total="total">
      </el-pagination>
    </div>

  </div>
</template>

<script>
export default {
  name: "File",
  data() {
    return {
      loading: false,
      tableData: [],
      name: '',
      multipleSelection: [],
      pageNum: 1,
      pageSize: 10,
      total: 0
    }
  },
  created() {
    this.load()
  },
  methods: {
    load() {
      this.loading = true
      setTimeout(() => {
        this.loading = false
        this.request.get("/file/page", {
          params: {
            pageNum: this.pageNum,
            pageSize: this.pageSize,
            name: this.name,
          }
        }).then(res => {
          this.tableData = res.data.records
          this.total = res.data.total
        })
      }, 500)
    },
    del(row) {
        this.$confirm('您确定删除吗?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(() => {
        this.request.delete("/file/" + row.id).then(res => {
          if (res.code === '200') {
            this.$message.success("删除成功")
            this.load()
          } else {
            this.$message.error("删除失败")
          }
        })
      }).catch(() => {
        this.$message({
          type: 'info',
          message: '已取消删除'
        });
      });
    },
    handleSelectionChange(val) {
      console.log(val)
      this.multipleSelection = val
    },
    delBatch() {
      this.$confirm('您确定要删除这些记录吗?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(() => {
        // 发送删除请求
        let ids = this.multipleSelection.map(v => v.id)  // [{}, {}, {}] => [1,2,3]
        this.request.post("/file/del/batch", ids).then(res => {
          if (res.code === '200') {
            this.$message.success("批量删除成功")
            this.load()
          } else {
            this.$message.error("批量删除失败")
          }
        })
      }).catch(() => {
        this.$message({
          type: 'info',
          message: '已取消删除'
        });
      });
    },
    reset() {
      this.name = ""
      this.load()
    },
    handleSizeChange(pageSize) {
      console.log(pageSize)
      this.pageSize = pageSize
      this.load()
    },
    handleCurrentChange(pageNum) {
      console.log(pageNum)
      this.pageNum = pageNum
      this.load()
    },
    handleFileUploadSuccess() {
      this.load()
    },
    download(url) {
      window.open(url)
    }
  }
}
</script>

<style scoped>

</style>